" Life is not a problem to be solved but a reality to be experienced! "
© Copyright 2013 - 2024 KUDO.TIPS - All rights reserved.
|2x+4|=6
2x+4=6 v 2x+4=-6
2x=2 v 2x=-10
x=1 v x=-5
2.
|x-1|+|x+1|=4
Dla x<-1
-(x-1)-(x+1)=4
-x+1-x-1=4
-2x=4
x=-2
Dla -1≤x<1
-(x-1)+x+1=4
-x+1+x+1=4
2=4
sprzeczne
Dla x≥1
x-1+x+1=4
2x=4
x=2
Odp. x∈{-2,2}